A soldier opened fire on fellow service members at the Fort Hood military base, killing three people and wounding 16 before committing suicide at the same post where more than a dozen people were slain in a 2009 attack, authorities said.

The shooter apparently walked into a building Wednesday and began firing a .45-caliber semi-automatic pistol that had been purchased recently. He then got into a vehicle and continued firing before entering another building and kept shooting. (AP)